To be able to choose what stage of the game you want to play place the red checker on the following numbers in order in Jukebox mode and press C at each one; 14, 15, 18, 5, 13, 1, 3, 18, 15, 6. Then highlight a number from 1 to 6 and press C to warp to the corresponding stage.

If you want to play the game without worrying about running out of health then at the 'Options' menu go to 'Jukebox' and press C on the following numbers; 3, 12, 17, 2, 2, 10, 2, 7, 7, 11. If you have entered the code correctly you will hear Skecth say 'Oh yeah'.